Now showing items 1-11 of 11

    • Black hole demographics from the M•[BH] − σ[sigma] relation 

      Merritt, David; Ferrarese, Laura (Monthly Notices of the Royal Astronomical Society, 2001-01)
      We analyze a sample of 32 galaxies for which a dynamical estimate of the mass of the hot stellar component, Mbulge, is available. For each of these galaxies, we calculate the mass of the central black hole, M•, using the ...
    • The evidence for jet-cloud interactions in a sample of high/intermediate-redshift radio galaxies 

      Solorzano-Inarrea, Carmen; Tadhunter, Clive; Axon, David (Blackwell Publishing: Monthly Notices of the Royal Astronomical Society, 2001-05)
      We present detailed long-slit spectroscopic observations of a sample of four powerful radio galaxies, with intermediate/high redshifts (0.47 < z < 0.81). The observations cover the rest-wavelength range 2600 °A- 6600 °A, ...
    • Spectroscopy of the near-nuclear regions of Cygnus A: Estimating the mass of the supermassive black hole 

      Tadhunter, Clive; Marconi, Alessandro; Axon, David; Wills, Karen; Robinson, TG; Jackson, Neal (Blackwell Publishing: Monthly Notices of the Royal Astronomical Society, 2003-07)
      We use a combination of high spatial resolution optical and near-IR spectroscopic data to make a detailed study of the kinematics of the NLR gas in the near-nuclear regions of the powerful, FRII radio galaxy Cygnus A ...
    • Supermassive black hole mass measurements for NGC 1300 and NGC 2748 based on HST [Hubble Space Telescope] emission-line gas kinematics 

      Atkinson, John; Collett, J.; Marconi, Alessandro; Axon, David; Alonso-Herrero, Almudena; Batcheldor, Dan; Binney, James; Capetti, Alessandro; Carollo, C. Marcella; Dressel, Linda; Ford, Holland; Gerssen, Joris; Hughes, M.; Macchetto, Duccio; Maciejewski, Witold; Merrifield, Michael; Scarlata, Claudia; Sparks, William; Stiavelli, Massimo; Tsvetanov, Zlatan; van der Marel, Roeland (Blackwell Publishing: Monthly Notices of the Royal Astronomical Society, 2005-05)
      We present Space Telescope Imaging Spectrograph emission-line spectra of the central regions of the spiral galaxies NGC 1300 and NGC 2748. From the derived kinematics of the nuclear gas we have found evidence for central ...
    • Testing the photoionization models of powerful radio galaxies: Mixed line-emitting media in 3C 321 

      Robinson, TG; Tadhunter, Clive; Axon, David (Blackwell Publishing: Monthly Notices of the Royal Astronomical Society, 2000-10)
      The photoionization models for the narrow emission line regions of powerful radio galaxies have yet to be tested in depth. To this end, we present high-quality long-slit spectroscopy of the powerful double-nucleus radio ...